package com.woniuxy.config.security.component;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Description:JWT 登录授权过滤器
 * @author: ykq11  <br/>
 * Date: 2022/1/29:0:33  <br/>
 */
public class JwtAuthencationTokenFilter extends OncePerRequestFilter {
    @Value("${jwt.tokenHeader}")
    private String tokenHeader;
    @Value("${jwt.tokenHead}")
    private String tokenHead;
    @Autowired
    private JwtTokenUtil jwtTokenUtil;
    @Autowired
    private UserDetailsService userDetailsService;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        String authHeader = request.getHeader(tokenHeader);
       // filterChain.doFilter(request, response);
        //存在token
         if(null!=authHeader && !"".equals(authHeader) && authHeader.startsWith(tokenHead)){
             String authToken = authHeader.substring(tokenHead.length());
             String username = jwtTokenUtil.getUsernameFromToken(authToken);
             //token存在用户名但是没登录
             if(null!=username && null ==SecurityContextHolder.getContext().getAuthentication()){
                 //登录
                 UserDetails userDetails = userDetailsService.loadUserByUsername(username);
                 //验证token是否有效，重新设置用户对象
                 if(jwtTokenUtil.validateToken(authToken,userDetails)){
                     UsernamePasswordAuthenticationToken authenticationToken =
                             new UsernamePasswordAuthenticationToken(userDetails, null, userDetails.getAuthorities());
                     authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
                     SecurityContextHolder.getContext().setAuthentication(authenticationToken);
                 }
             }
         }
        filterChain.doFilter(request, response);
    }
}
